Dragging charges to reload part-filled weapon in station results in exception

[matthew1smith]

Describe the bug
Dragging stacks of charges to reload a part-filled hybrid turret results in an exception. Doesn't matter which tab (Items/Cargo) is used.

To Reproduce
Steps to reproduce the behavior:

1. /create 7487 2 To create 2x Modal Light Electron Particle Accelerator I
2. /create 222 500 To create 500x Antimatter Charge S.
3. Dock at station if not already.
4. Fit turrets into high slots (I used a Merlin, which I used the GM Give skills button for flying).
5. Split ammo into two stacks, 1x100 and 1x400.
6. Drag the 100 stack into a turret.
7. Drag the 400 stack into the same turret.

Expected behavior
The required amount of ammo should transfer into the target fitted weapon, leaving the remainder in the stack.

System Details (please complete the following information):

• Server OS: Windows 10 using DockerDesktop, GDB active within image, shown as Fedora 10.2-4.fc33
• Docker build
• EVEmu Version 0.8.4 (staging)

Additional context
Error message:
10:38:34 [Service] alert::BeanCount()
10:38:34 [Service] alert::SendClientStackTraceAlert()
EXCEPTION #5 logged at 03/22/2022 20:38:34 OnModuleAttributeChanges::Unexpected exception

Caught at:
/common/lib/bluepy.py(86) CallWrapper
/client/script/dogma/clientdogmalocation.py(215) OnModuleAttributeChanges

Thrown at:
/client/script/dogma/clientdogmalocation.py(192) OnModuleAttributeChanges
itemID = 140000184
self = <dogmax.DogmaLocation instance at 0x076040A8>
eventName = 'OnModuleAttributeChange'
attributeID = 805
oldValue = None
time = 132924191143104400L
ownerID = 90000002
changes = [(...)]
newValue = 100
change = ('OnModuleAttributeChange', 90000002, 140000184, 805, 132924191143104400L, 100, None)
TypeError: 'int' object is not subscriptable

Thread Locals: session was <Session: (sid:7464734182547885531, clientID:0, mutating:0, locationid:60014689, corprole:0x0, userid:3, languageID:EN, role:0x62f8000280c41000L, charid:90000002, address:172.21.0.1:48096, userType:30, sessionType:5, regionid:10000064, constellationid:20000727, warfactionid:0, corpid:1000168, stationid:60014689, stationid2:60014689, worldspaceid:60014689, solarsystemid2:30004971, hqID:60014689, baseID:60014689, rolesAtAll:0x0, rolesAtHQ:0x0, rolesAtBase:0x0, rolesAtOther:0x0, genderID:1, bloodlineID:8, raceID:8, corpAccountKey:1000)>

EXCEPTION END